To pass by reference , C# provides the ref parameter modifier. - CSharp Custom Type

CSharp examples for Custom Type:Method Parameter

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Introduction

In the following example, p and x refer to the same memory locations:

Demo Code

using System;//from w w w.ja  v  a  2  s .  co  m
class Test
{
   static void Foo (ref int p)
   {
      p = p + 1;               // Increment p by 1
      Console.WriteLine (p);   // Write p to screen
   }
   static void Main()
   {
      int x = 8;
      Foo (ref  x);            // Ask Foo to deal directly with x
      Console.WriteLine (x);   // x is now 9
   }
}

Result


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